标准型风刀的风速标定及其流场特性研究

采用IFA-300热线风速仪对由成都光电研究所研制的压缩气体驱动的标准型风刀在不同压强下刀口处的风速进行了标定,并对风刀刀口处的流场特性进行了研究,实验结果表明,风刀刀口处的风速与压缩气体的压强成线性关系,压强越大,刀口处的风速也越大;风刀刀口处流场的稳定性和均匀性与流场的具体位置有关,风刀风道中心位置的流场流速最大,不稳定度最低,大约为2%;在风刀风道的边缘位置,流场流速最小,不稳定度最高,不稳定度接近28%左右。

Abstract

Wind velocity in different barometric pressure and characteristics of the flow field at the vent port of air knife, designed by Institute of Optics and Electronics, Chinese Academy of Sciences, driven by compressed gas were calibrated and analyzed by using a IFA-300 hot-wire anemometer. The results show that wind velocity has a good liner relation with barometric pressure; the larger the pressure is, the greater the velocity is; and the uniformity and stability of flow field at the vent port are related to the location of flow field. In the centre of the flow field, the velocity of flow field was the largest, and the instability was the lowest, its value was close to 2%. On the edge of the flow field, the velocity of flow field was the lowest, and the instability was the largest, its value approximately equaled 28%.

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向文杰, 吴晓庆, 侯再红. 标准型风刀的风速标定及其流场特性研究[J]. 大气与环境光学学报, 2013, 8(5): 321. XIANG Wen-jie, WU Xiao-qing, HOU Zai-hong. Velocity Calibration and Investigation of Flow Field at Air Knife Exit[J]. Journal of Atmospheric and Environmental Optics, 2013, 8(5): 321.

标准型风刀的风速标定及其流场特性研究

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